Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ebfa5013674aed…

MALICIOUS

PDF

38.9 KB Created: 2020-08-11 09:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d486d2fa9b0606f408780d533759c8 SHA-1: 3cfd51f5e156ed71ce7ba5056576ea044fd7b783 SHA-256: c7ebfa5013674aed30e725b3c54e717c480b74f992bf4cd96ef3e6e6777ffc36
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a link to a PDF about car aerodynamics. The PDF also contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=competition+car+aerodynamics+3rd+edition+pdf
    • http://files.highlandspirittours.co.uk/uploads/1/3/1/4/131484029/452e1a1.pdf
    • http://files.stthomasnewton.net/uploads/1/3/0/8/130813796/b36241609c7cdac.pdf
    • http://zezin.diluvioaz.com/uploads/1/3/1/6/131606349/7820785.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/9938152763.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/goodreader_vs_expert_for_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0451/1688/3109/files/benim_hocam_muhasebe_video_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/53122470835.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/iowa_state_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/gotamitavadip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/70688323130.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/81489496168.pdf
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/cfa_sample_exam.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/adsorption_theory_modeling_and_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/planos_arquitectonicos_completos_de_casa_habitacion.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/cfa_sample_e

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ac6.bin
0247d7bece3be749d28bb8b16ed0c3bc1a188872f79208ce6552fccace456aae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC6 5440 bytes
font_01_sfnt_off00006d2b.bin
4f8218463aa830b2dd80af1dc3b2ce72ebc5c8680056f2a4c345808b0b4b3f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2B 9596 bytes

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